Analytical yield spectrum approach to electron energy degradation in earth's atmosphere

Details Analytical yield spectrum approach to electron energy degradation in earth's atmosphere Analytical yield spectrum approach to electron energy degradation in earth's atmosphere

Sep 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jgr....88.7185h&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 88, Sept. 1, 1983, p. 7185-7189. Research supported by the Indian Space R

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19

Earth Atmosphere, Electron Energy, Energy Spectra, Incident Radiation, Atmospheric Ionization, Gas Mixtures, Oxygen Ions, Rates (Per Time), Vertical Distribution, Yield

Scientific paper

The analytical yield spectrum approach developed by Green et al. (1977) and Jackman and Green (1979) and extended by Singhal et al. (1980) and Singhal and Green (1981) is used to calculate the electron flux, excitation, and ionization profiles. The method, as applied in its full detail to the earth's atmosphere, is introduced, and the results it yields are compared with those obtained by Banks et al. (1974) and Mantas and Walker (1976). With regard to excitation, good agreement with the results of Mantas and Walker is found as far as the position of the peak is concerned. At low altitudes, the results obtained here show a gradual fall off of the excitation rate; this is in contrast to the sharp cutoff obtained by Mantas and Walker. A possible reason for this is that the present results are based on Monte Carlo studies in which the electrons are followed down to the lowest excitation threshold. This leads to more straggling. Another reason for the low altitude tail may involve the use of smooth analytical functions.

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